For a n invertible matrix with a n LU factorization

For a n invertible matrix with a n LU factorization A = LU, both L and U will be invertible and A-l = U-1 L-1. In Exercises, find L-1, U-1, and A-1 for the given matrix.
a. A in Exercise 1
For a n invertible matrix with a n LU factorization

b. A in Exercise 4

For a n invertible matrix with a n LU factorization

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